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How to Use W5500: Examples, Pinouts, and Specs

Image of W5500
Cirkit Designer LogoDesign with W5500 in Cirkit Designer

Introduction

The W5500 is a standalone Ethernet controller designed to simplify the process of connecting microcontrollers to the Internet. It features an integrated TCP/IP stack, which supports protocols such as TCP, UDP, ICMP, IPv4, ARP, IGMP, and PPPoE. This makes it an ideal choice for applications requiring reliable and efficient network communication. The W5500 communicates with microcontrollers via an SPI (Serial Peripheral Interface), ensuring compatibility with a wide range of systems.

Explore Projects Built with W5500

Use Cirkit Designer to design, explore, and prototype these projects online. Some projects support real-time simulation. Click "Open Project" to start designing instantly!
ESP32 and W5500 Ethernet Module Controlled 8-Channel Relay
Image of ESP32 38Pin 8 Channel Relay USB-C: A project utilizing W5500 in a practical application
This circuit enables Ethernet connectivity and device control through an ESP32 microcontroller. It uses the W5500 Ethernet module for network communication and controls an 8-channel relay module for switching external devices or loads.
Cirkit Designer LogoOpen Project in Cirkit Designer
ESP32-Based Environmental Monitoring and Home Automation System with Ethernet Connectivity
Image of ESP32 30Pin 3Phase AC Box W5500 Ethernet Standard: A project utilizing W5500 in a practical application
This circuit features an ESP32 microcontroller interfaced with a W5500 Ethernet module for network connectivity, a DHT22 sensor for measuring temperature and humidity, a ZMPT101B module for AC voltage sensing, and an Adafruit SHTC3 sensor for additional temperature and humidity readings. The ESP32 also controls a 4-channel relay module for switching external devices. The sensors and Ethernet module communicate with the ESP32 via GPIO pins, with the W5500 using SPI and the SHTC3 using I2C. Common ground and power lines are shared among the components.
Cirkit Designer LogoOpen Project in Cirkit Designer
ESP32-Based Smart Ethernet Weather Station with DHT22 Sensor and Relay Control
Image of ESP32 Single and Double AC with Temp 30Pin Micro and USBC: A project utilizing W5500 in a practical application
This circuit features an ESP32 microcontroller interfaced with a W5500 Ethernet module, a DHT22 temperature and humidity sensor, and a 2-channel relay module. The ESP32 is configured to communicate with the W5500 module via SPI for network connectivity, read sensor data from the DHT22, and control devices through the relay module. The purpose of this circuit is likely for environmental monitoring and control over a network.
Cirkit Designer LogoOpen Project in Cirkit Designer
Raspberry Pi 5 Ethernet Module Integration for Enhanced Connectivity
Image of w5500: A project utilizing W5500 in a practical application
This circuit connects a Raspberry Pi 5 to a W5500 Ethernet module, enabling Ethernet connectivity. The Raspberry Pi communicates with the W5500 via SPI interface, and a resistor is used to manage the reset signal for the Ethernet module.
Cirkit Designer LogoOpen Project in Cirkit Designer

Explore Projects Built with W5500

Use Cirkit Designer to design, explore, and prototype these projects online. Some projects support real-time simulation. Click "Open Project" to start designing instantly!
Image of ESP32 38Pin 8 Channel Relay USB-C: A project utilizing W5500 in a practical application
ESP32 and W5500 Ethernet Module Controlled 8-Channel Relay
This circuit enables Ethernet connectivity and device control through an ESP32 microcontroller. It uses the W5500 Ethernet module for network communication and controls an 8-channel relay module for switching external devices or loads.
Cirkit Designer LogoOpen Project in Cirkit Designer
Image of ESP32 30Pin 3Phase AC Box W5500 Ethernet Standard: A project utilizing W5500 in a practical application
ESP32-Based Environmental Monitoring and Home Automation System with Ethernet Connectivity
This circuit features an ESP32 microcontroller interfaced with a W5500 Ethernet module for network connectivity, a DHT22 sensor for measuring temperature and humidity, a ZMPT101B module for AC voltage sensing, and an Adafruit SHTC3 sensor for additional temperature and humidity readings. The ESP32 also controls a 4-channel relay module for switching external devices. The sensors and Ethernet module communicate with the ESP32 via GPIO pins, with the W5500 using SPI and the SHTC3 using I2C. Common ground and power lines are shared among the components.
Cirkit Designer LogoOpen Project in Cirkit Designer
Image of ESP32 Single and Double AC with Temp 30Pin Micro and USBC: A project utilizing W5500 in a practical application
ESP32-Based Smart Ethernet Weather Station with DHT22 Sensor and Relay Control
This circuit features an ESP32 microcontroller interfaced with a W5500 Ethernet module, a DHT22 temperature and humidity sensor, and a 2-channel relay module. The ESP32 is configured to communicate with the W5500 module via SPI for network connectivity, read sensor data from the DHT22, and control devices through the relay module. The purpose of this circuit is likely for environmental monitoring and control over a network.
Cirkit Designer LogoOpen Project in Cirkit Designer
Image of w5500: A project utilizing W5500 in a practical application
Raspberry Pi 5 Ethernet Module Integration for Enhanced Connectivity
This circuit connects a Raspberry Pi 5 to a W5500 Ethernet module, enabling Ethernet connectivity. The Raspberry Pi communicates with the W5500 via SPI interface, and a resistor is used to manage the reset signal for the Ethernet module.
Cirkit Designer LogoOpen Project in Cirkit Designer

Common Applications and Use Cases

  • IoT (Internet of Things) devices
  • Home automation systems
  • Industrial control and monitoring
  • Network-enabled embedded systems
  • Data logging and remote monitoring
  • Web servers and networked sensors

Technical Specifications

Key Technical Details

Parameter Value
Supply Voltage 3.3V (with 5V-tolerant I/O pins)
Operating Current 132 mA (typical)
Communication Interface SPI (up to 80 MHz)
Network Protocols TCP, UDP, ICMP, IPv4, ARP, IGMP, PPPoE
Ethernet Speed 10/100 Mbps
Internal Memory 32 KB for TX/RX buffers
Operating Temperature -40°C to +85°C
Package Type LQFP-48 or QFN-48

Pin Configuration and Descriptions

The W5500 has 48 pins, but the most commonly used pins for interfacing are listed below:

Pin Name Pin Number Description
VDD 1 3.3V power supply input
GND 2 Ground
SCLK 3 SPI clock input
MISO 4 SPI master-in/slave-out data line
MOSI 5 SPI master-out/slave-in data line
CS 6 SPI chip select (active low)
RESET 7 Reset input (active low)
INT 8 Interrupt output (active low)
RDY 9 Ready signal for SPI communication
TX+ 10 Ethernet transmit positive
TX- 11 Ethernet transmit negative
RX+ 12 Ethernet receive positive
RX- 13 Ethernet receive negative

For a complete pinout, refer to the W5500 datasheet.

Usage Instructions

How to Use the W5500 in a Circuit

  1. Power Supply: Connect the VDD pin to a 3.3V power source and GND to ground. Ensure the power supply is stable and capable of providing sufficient current.
  2. SPI Interface: Connect the SPI pins (SCLK, MISO, MOSI, and CS) to the corresponding pins on your microcontroller. Use pull-up resistors on the CS line if necessary.
  3. Ethernet Connection: Connect the TX+/TX- and RX+/RX- pins to an Ethernet transformer or RJ45 connector for network communication.
  4. Reset and Interrupt: Use the RESET pin to initialize the W5500 and the INT pin to handle interrupts for events like data reception.
  5. Crystal Oscillator: Connect a 25 MHz crystal oscillator to the XTAL1 and XTAL2 pins for clock generation.

Important Considerations and Best Practices

  • Use decoupling capacitors (e.g., 0.1 µF) near the VDD pin to reduce noise and ensure stable operation.
  • Ensure proper termination of Ethernet lines to avoid signal reflections and maintain signal integrity.
  • Use a level shifter if interfacing with a 5V microcontroller, as the W5500 operates at 3.3V logic levels.
  • Configure the SPI clock speed to match the W5500's specifications (up to 80 MHz).
  • Initialize the W5500's internal registers and memory buffers before starting communication.

Example Code for Arduino UNO

Below is an example of how to use the W5500 with an Arduino UNO to establish a basic Ethernet connection:

#include <SPI.h>
#include <Ethernet.h>

// MAC address and IP address for the W5500
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192, 168, 1, 100);

// Initialize the Ethernet server on port 80
EthernetServer server(80);

void setup() {
  // Start the serial communication for debugging
  Serial.begin(9600);
  while (!Serial) {
    ; // Wait for the serial port to connect
  }

  // Initialize the Ethernet connection
  if (Ethernet.begin(mac) == 0) {
    Serial.println("Failed to configure Ethernet using DHCP");
    // Manually configure the IP address if DHCP fails
    Ethernet.begin(mac, ip);
  }

  // Start the server
  server.begin();
  Serial.print("Server is at ");
  Serial.println(Ethernet.localIP());
}

void loop() {
  // Listen for incoming clients
  EthernetClient client = server.available();
  if (client) {
    Serial.println("New client connected");
    // Read data from the client and send a response
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
        Serial.write(c); // Echo the received data to the serial monitor
        // Send a basic HTTP response
        client.println("HTTP/1.1 200 OK");
        client.println("Content-Type: text/html");
        client.println("Connection: close");
        client.println();
        client.println("<!DOCTYPE HTML>");
        client.println("<html>Hello, W5500!</html>");
        break;
      }
    }
    // Close the connection
    client.stop();
    Serial.println("Client disconnected");
  }
}

Notes:

  • Replace the MAC and IP address with values suitable for your network.
  • Ensure the Ethernet library is installed in your Arduino IDE.

Troubleshooting and FAQs

Common Issues and Solutions

  1. No Ethernet Connection:

    • Verify the Ethernet cable is securely connected to the RJ45 jack.
    • Check the TX+/TX- and RX+/RX- connections for proper wiring.
    • Ensure the W5500 is powered correctly and the SPI interface is configured properly.

  2. SPI Communication Fails:

    • Confirm the SPI clock speed is within the W5500's supported range.
    • Check the CS pin connection and ensure it is pulled low during communication.
    • Verify the microcontroller's SPI pins are correctly connected to the W5500.

  3. Device Not Responding:

    • Reset the W5500 using the RESET pin and reinitialize the registers.
    • Check for proper grounding and decoupling capacitors near the power pins.

  4. Incorrect IP Address:

    • Ensure the MAC and IP address are unique and do not conflict with other devices on the network.
    • Use a static IP configuration if DHCP fails.

FAQs

Q: Can the W5500 be used with 5V microcontrollers?
A: Yes, the W5500 has 5V-tolerant I/O pins, but it operates at 3.3V. Use a level shifter for optimal performance.

Q: What is the maximum SPI clock speed supported by the W5500?
A: The W5500 supports SPI clock speeds up to 80 MHz.

Q: Does the W5500 support IPv6?
A: No, the W5500 only supports IPv4.

Q: How much memory is available for data transmission and reception?
A: The W5500 has 32 KB of internal memory, which is shared between TX and RX buffers.

Q: Can the W5500 handle multiple simultaneous connections?
A: Yes, the W5500 supports up to 8 independent sockets for simultaneous connections.